Control of Colletotrichum gloeosporioides (penz.) Sacc. In yellow passion fruit using Cymbopogon citratus essential oil

Abstract

The use of antibiotics in agriculture is limited when compared to their applications in human and veterinary medicine. On the other hand, the use of antimicrobials in agriculture contributes to the drug resistance of human pathogens and has stimulated the search for new antibiotics from natural products. Essential oils have been shown to exert several biological activities including antibacterial and antifungal actions. The aim of this study was to determine the activity of 28 essential oils from medicinal plants cultivated at CPMA (Medicinal and Aromatic Plants Collection), CPQBA/UNICAMP, against Colletotrichum gloeosporioides (Penz.) Sacc., the anthracnose agent in yellow passion fruit (Passiflora edulis Sims f. flavicarpa Deg), as well as evaluating their effect in the control of post-harvest decay. The oils were obtained by water-distillation using a Clevenger-type system and their minimal inhibitory concentrations (MIC) determined by the micro-dilution method. According to the results, 15 of the 28 essential oils presented activity against Colletotrichum gloeosporioides, and the following four oils presented MIC values between 0.25 and 0.3 mg/mL: Coriandrum sativum, Cymbopogon citratus, Cymbopogon flexuosus and Lippia alba. The evaluation of Cymbopogon citratus essential oil in the control of post-harvest decay in yellow passion fruit showed that the disease index of the samples treated with the essential oil did not differ (P < 0.05) from that of the samples treated with fungicide. The present study shows the potential of Cymbopogon citratus essential oil in the control of the anthracnose agent in yellow passion fruit

Cymbopogon citratus essential oil bioactivity and the induction of enzymes related to the pathogenesis of Alternaria solani on tomato plants

“…Scanning electron microscopy (SEM) observations revealed significant alterations in the growth pattern of D. bryoniae hyphae using the essential oil of A. millefolium (Fiori et al, 2000). Anaruma et al (2010) tested 28 essential oils, found the activity of 15 of them against Colletotrichum gloeosporioides, agent of anthracnose on yellow passion fruit (Passiflora edulis). Of the oils tested C. citratus to a performance similar to fungicides.…”

Lemongrass Productivity, Oil Content, and Composition as a Function of Nitrogen, Sulfur, and Harvest Time

“…L emongrass is one of the most widely grown essential oil plants in the tropics and subtropics of India, Indonesia, Madagascar, and countries in Africa and South America (Anaruma et al, 2010;Ganjewala and Luthra, 2010;Weiss, 1997). Lemongrass is grown as a perennial crop under either irrigated or nonirrigated conditions, but a large area is harvested from wild natural habitats such as in mixed forests or along banks of canals and rivers (Singh and Sharma, 2001;Weiss, 1997).…”

“…Lemongrass biomass is steam distilled for the extraction of essential oil, a natural product with wide application in the food and pharmaceutical industries, perfumery and cosmetics, and eco-friendly pesticides (Ganjewala and Luthra, 2010;Weiss, 1997). Lemongrass oil has a pleasant and refreshing aroma and antifungal and antibacterial properties (Anaruma et al, 2010;Guynot et al, 2003;Pandey et al, 2003;Kumar et al, 2007Kumar et al, , 2009Inouye et al, 2001;Pattnaik et al, 1996). However, lemongrass essential oil production is currently limited to the tropics and subtropics.…”

Essential oil of Cymbopogon flexuosus, Vernonia polyanthes and potassium phosphite in control of bean anthracnose

“…This probably resulted from the high volatility of C. flexuosus essential oil, which killed fungal cells in the upper part of the mycelium disc that comes not in contact with culture medium. Anaruma et al (2010) Bakkali et al (2008), as these oxygenated monoterpenes are hydrophobic they will probably want to move towards the aqueous phase of membrane structures. Accumulation of essential oil constituents in the lipid bilayer of the cytoplasmic membrane makes it permeable, thus promoting dissipation of the proton motive force.…”